- sherpa.astro.ui.save_pha(id, filename=None, bkg_id=None, ascii=False, clobber=False)
Save a PHA data set to a file.
id (int or str, optional) – The identifier for the data set to use. If not given then the default identifier is used, as returned by
filename (str) – The name of the file to write the array to. The format is determined by the
bkg_id (int or str, optional) – Set if the background should be written out rather than the source.
ascii (bool, optional) – If
Falsethen the data is written as a FITS format binary table. The default is
True. The exact format of the output file depends on the I/O library in use (Crates or AstroPy).
clobber (bool, optional) – If
None, then this flag controls whether an existing file can be overwritten (
True) or if it raises an exception (
False, the default setting).
sherpa.utils.err.ArgumentErr – If the data set does not contain PHA data.
sherpa.utils.err.IOErr – If
filenamealready exists and
Load a PHA data set.
The function does not follow the normal Python standards for parameter use, since it is designed for easy interactive use. When called with a single un-named argument, it is taken to be the
filenameparameter. If given two un-named arguments, then they are interpreted as the
filenameparameters, respectively. The remaining parameters are expected to be given as named arguments.
Write out the PHA data from the default data set to the file ‘src.pi’:
Over-write the file it it already exists, and take the data from the data set “jet”:
>>> save_pha('jet', 'out.pi', clobber=True)
Write the data out as an ASCII file:
>>> save_pha('pi.dat', ascii=True)